Concrete placement apparatus



Jan. 6, 1942. JACKSON 2.269410 CONCRETE PLACEMENT APPARATUS Filed Sept. 1, 1939 3 Sheets-Sheet l INVENTOR. flQ/W M/ (740K600 ORNEYS Jan. 6, 1942. c. JACKSON CONCRETE PLACEMENT APPARATUS Filed Sept. 1, 1939 3 Sheets-Sheet INVEIQTOR.

BY far/WW Mac/r60 5 M1 i-vfiw ATTORNEYS 1942- c. JACKSON 2,269,110

CONCRETE PLACEMENT APPARATUS Filed Sept. 1, 1939 3 Sheets-Sheet 5' v r I 42 I 40 L 42 14 I] 1i Qt P N H 1L H o l i- (L I J 2 INVEMOR.

z 2/ BY 6 Z/ /f/ MS ATTORNEYS Patented Jan. 6, 1942 v UNITED STATES PATENT 1 OFFICE CONCRETE. PLACEMENT APPARATUS Corwill Jackson, Ludington, Mich. Application September 1, 1939,-SerialNo.293,049

(or. 94-48): V

1 3 Claims.

The main objects of this invention are:

First, to provide a machine or apparatus for the placement of concrete such as pavements, concrete slabs, the walls of ditches, conduits, or the like, which is adapted for use with a'wide range of concrete mixtures inthe matter of proportions of aggregates, fines, water and cement ratio.

Second, to provide a machine of this character which is capable of a wide range of adjustment or adaptation to meet the conditions of the mix to be placed or the specifications of its placement.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a fragmentary plan view of a concrete placement apparatus of the paving machine type, only such parts being illustrated as are deemed required for the purpose of illustrating an embodiment of my-invention and certain parts being shown conventionally.

other possible position of the adjustment of the vibratory element, the vibratory. action of the vibratory element being indicated generally by the dotted lines in Figs. 2, 3 and 4. i

Fig. 5 is a fragmentary plan view of a modified form of vibratory element, the modifications being in the positioning of the vibratory members of the vibratory element and of the vibratory rotor.

Fig. 6 is a fragmentary front elevation of the structure shown in Fig. 5.

Fig. 7 is an end elevation with the supporting member shown in section.

Fig. 8 is a diagrammatic View showing the relation of a pair of vibratory members submerged in a mass being treated and indicating that the vibrations imparted to the mass by the individual vibratory elements merge.

In the accompanying drawings, l represents I the side forms of a pavement or slab to be laid which serves as a track for the paving machine 2 provided with a screed 3. This screed is provided with a face plate 4 of substantial height and adapted to..support a considerable mass of material "indicated at 5 and against which it is advanced in operation. The screed is provided ,with forwardly extending end wings 6 which overhang the forms.

1 :My present invention in generalrelates to the type of concrete placement machine illustrated in/my- Patent No. 2,150,325 issued March 14, 1939, and it" also embodies certain features of and in some respects is a modification of and improvement upon'the structure shown in my Patent No. 2,199,074, of April 30, 1940.

I provide an auxiliary vibratory element carrying frame which comprises side or end members 1 anda transverse member 8 preferably tubular, as illustrated. The side members are secured to the push bars 9 by means of the clamps l0, thus securing an adjustable connection for the push bars for the positioning of the vibratory element carried by the frame relative to the screed. Braces II are provided for the frame side members, these braces being secured to the push bars by the adjustable clamps l2.

The auxiliary frame is provided with carrying wheels I3 mounted in the forked wheel supports 14 pivoted at [-5 on the side frame mem-- bers, the rocking of the wheel supports on their pivots serving to raise and lower the auxiliary frame andthe vibratory element, to be described, carried thereby. The wheel supports arev preferably actuated by a hydraulic means consisting of the cylinder l6,.-the plunger rod l'l of which is .connected'by the link I8 to one wheel support and isalso connected to the arm IS on the rockbers 2| arranged in spaced relation for generally I endwise advancement and in a submerged relation to the mass of concrete treated, as shown in Figs. 2, Band 4. These vibratory members are provided with uprightbrackets 22 which are fixedly secured to a pair of longitudinal bars 23 and 24. These parts are preferably joined by welding so that they constitute a rigid unit adaptedfor unitary vibration. r

The vibratory members 2| preferably have rounded front ends 25 and tapered rear. ends 26, and in the embodiment ofFigs. 1 1.04 inclusive,

they are arranged in oppositely inclined groups; that is, the vibratory members of one group are oppositely inclined relative to the vibratory members of the other group, and the members are arranged in a generally inclined relation to the path of advancement. They are so spaced that the vibrations set up by one member merge with the vibrations of another. Being disposed at an angle, so that the rear end of one extends beyond the path of advancement of the front end of another member of the group, results in insuring a complete vibration of the mass through which the vibrating element is advanced, and arranged in this inclined relation they also serve to stir the aggregate in addition to subjecting it to the vibratory impulses.

The means for vibrating comprises an unbalanced rotor 21 which is mounted on the brackets 28 carried by the longitudinal members 23-and 24. The unbalanced rotor is conventionally ilb lustrated by dotted lines. This may be driven from a motor mounted on the brackets or through a flexible shafting, as indicated at 29. The vibratory element is suspended for free vibratory movement by means of the flexible nonextensible hangers 30 which are connected at their lower ends to the hanger bracket 3| on the longitudinal members of the vibratory element, the brackets also constituting renforcing tie members for the longitudinal members.

The hangers 30 are carried by brackets 32 mounted on the frame member 8 by means of the U-bolts 33. The brackets 32 are provided with forwardly projecting draft arms 35 connected by the flexible non-extensible straps 36 to the front longitudinal member 24 of the vibratory element (see Fig. 2). By rotatively adjusting the brackets'32 on the member 8, the vibratory element may be supported with its vibratory members in a tilted position, as shown in Fig, 4. It is clear that they might be tilted in the opposite direction if desired.

By adjustment of the brackets l and I2 on the push bars, the relation of the vibratory element to the screed may be adjusted so that, for

example, the rear ends of the vibratory members may extend below the shoe 31 of the screed or it may be adjusted to a position shown in Fig. 3 entirely in front of the screed, and it will be understood that that is the normal condition of operation, the position shown in Fig. 2 being a desirable position where conditions or engineering specifications require vibration directly under the screed.

In the embodiment of my invention shown in Figs. to 8 inclusive, the vibratory members 2| are disposed at right angles to the support members 23 and 24, instead of being inclined relative thereto as shown in Fig. 1. The vibratory motor 40 (in this case an electric motor) is provided with a rotor having an unbalancing weight 4| (see Fig. 6). This vibratory motor is carried by brackets 42 mounted centrally on the members 23 and 24, the axis of the rotor, indicated at 43, being arranged transversely of the vibratory element instead of longitudinally thereof, as shown in the embodiments previously described. The vibratory element is provided with the same supporting and adjusting means as described for the embodiment of Figs. 1 to 4, and therefore the supporting and adjusting mechanism and the relation to the screed is not illustrated in these Figs. 5 to 8.

44, while in Fig. 8 the vibrations imparted to the mass, indicated at 45, are shown by the dotted line 46, the vibration of the elements 2| being in an elongated orbit with the greatest amplitude vertically, and which results in greater depth of penetration or compaction. The vibratory members 2| are so spaced that the vibrations imparted thereby to the mass merge, as is generally indicated in Fig. 8.

I have illustrated and described my improvements in very practical embodiments thereof. I have not attempted to illustrate or describe certain other embodiments or adaptations, as it is believed that this disclosure will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a machine of the class described, the combination with a screed having a face plate adapted to support a substantial amount of material to be treated. of a vibratory element supporting means advanced with the said screed and provided with means for vertical adjustment thereof and with means permitting adjustment thereof to and from the screed, a horizontally disposed submersible vibratory element carried by said supporting means for adjustment therewith, said vibratory element comprising a plurality of spaced cylindrical rod-like vibratory members disposed for endwise advancement in a horizontal plane and. having spaced upwardly projecting brackets thereon, transverse bars fixedly secured to said brackets, said vibratory members being arranged in oppositely inclined groups disposed at an angle to the path of advancement of the Vibratory element, said members having rounded front ends and rearwardly tapered rear ends, vibrating unit supporting brackets mounted centrally on said transverse bars and hanger brackets adjacent the ends thereof, means for imparting high frequency vibrations to said vibratory element comprising an unbalanced rotor mounted on said vibrating unit supporting brackets, and flexible non-extensible hangers connecting said hanger brackets tosaid supporting means.

2. In a machine of the class described, the combination with a screed having a face plate adapted to support a substantial amount of material to be treated, of a vibratory element supporting means advanced with the said screed and provided with means for vertical adjustment thereof, a horizontally disposed submersible vibratory element carried by said supporting means for adjustment therewith, said vibratory element comprising a plurality of spaced rod-like vibratory members disposed for endwise advancement in a horizontal plane and having spaced upwardly projecting brackets thereon, transverse bars fixedly secured to said brackets, said vibratory members being arranged in inclined relation to the path of advancement of the vibratory element, vibrating unit supporting brackets mounted centrally on said transverse bars and hanger brackets at each side of said vibrating unit supporting brackets, means for imparting high frequency vibrations to said vibratory element comprising an unbalanced rotor mounted onsaid motor supporting brackets, and flexible non-extensible hangers connecting said hanger brackets to said supporting means.

3. In a machine of the class described, the combination with a screed having a faceplate adapted to support a substantial amount of material to be treated, of a vertically adjustable vibratory element supporting means advanced with the said screed, a horizontally disposed submersible vibratory element carried by said supporting means for adjustment therewith, said vibratory element comprising a plurality of spaced elongated vibratory members disposed for endwise advancement in a horizontal plane, transverse bars fixedly secured to said members,

said vibratory members being arranged in oppositely inclined groups disposed in an inclined relation to the path of advancement of the vibratoryelement, and means for imparting high frequency vibrations to said vibratory element.

4. In a machine of theclass described, the-combination with a screed havinga face plate adapted to support asubstantial amount of -material to be treated, of a vertically adjustable vibratory element supporting means advanced with the said screed, a horizontally disposed submersible vibratory element carried by said supporting bination with a screed having a face plate adapted to support a substantial amount of material to be treated, of a horizontally disposed submersible vibratory element comprising a plurality of spaced vibratory rod members disposed for endwise advancement in a horizontal plane, connecting bar means to which said vibratory members are fixedly secured in oppositely inclined groups disposed at an angle to the path of advancement of the vibratory element, motor actuated means connected to the vibratory element forvibrating said vibratory element at high frequency, and means connected to said vibratory element and screed and supporting said vibratory element for advancement with said screed, said supporting means being vertically adjustable relative to said screed to position the vibratory element below the plane of the bottom of the screed.

6. In a machine of the class described, the combination with a screed having a face plate adapted to support a substantial amount of material to be treated, of a horizontally disposed submersible vibratory element comprising a plurality of spaced elongated vibratory members disposed for endwise advancement in a horizontal plane, connecting bar means to which said vibratory members are fixedly secured for endwise advancement, motor actuated means connected to the vibratory element forvibrating said vibratory element at high frequency, and means connected to said screed for vertical adjustment relative thereto for supporting said vibratory element for advancement with said screed and for vertical adjustment relative to the work, said supporting means including a supporting member connected to the screed for vertical adjustment relative thereto and means adjustably positioning and supporting the vibratory element on said member at difierent distances from the screed in the direction of travel of the latter.

7. In a machine of the class described, the combination with a screed having a face plate adapted to support a substantial amount of material to be treated, of a horizontally'disposed submersible vibratory element comprising a pmrality of spacedvibratory rod members, and connecting bar means to which said vibratoryv members are fixedly secured for endwise advancement, motor actuated means' connected to said vibratory element for vibrating said vibratory element at high frequency,-and adjustable means for supporting said vibratory element for advancement with said screed, including a supporting member connected to the screed for vertical adjustment relative thereto and means adjustably positioning the vibratory element on said supporting member at different distances from the screed in the direction of travel of the latter, said last named means including a tiltable connection enabling transverse tiltingv adjustment of said element relative to the plane of the. shoe of the screed. I

p '8. In a machine of the class described, .the combination with ascreed having a face plate adapted to support a substantial amount of :ma-

terial to 'be'treated, of a horizontally disposed submersible vibratory element comprising a plurality of spaced vibratory rod members, and connecting bar means to which said vibratory members are fixedly secured for endwise advancement, motor actuated means connected to said vibratory element for vibrating said vibratory element at'high frequency, and adjustable means for supporting said vibratory element for advancement with said screed including a supporting member connected to the screed and adjustable connecting means adjustably positioning the vibratory element relative to said supporting member at different distances from the screed in the direction of travel of the latter, said last named means including a tiltable connection enabling transverse tilting adjustment of the vibratory element relative to the plane of the shoe of the screed. Y

9. In a machine of the class described, the combination of a submersible vibratory element comprising a plurality of elongated vibratory members disposed in spaced relation to each other for generally endwise advancement in a horizontal plane, transverse connecting means to which said vibratory members are rigidly secured, and motor actuated means connected to said vibratory element for imparting high frequency vibrations to said vibratory members comprising an unbalanced rotor mounted on said transverse connecting means with its axis in approximately parallel relation to the length of said vibratory members, said vibratory members being spaced to permit the passage therebetween of material being treated, said spacing being substantial so as to accommodate a substantial mass of material between the members, but being sufliciently close to permit the vibratory impulses imparted to the material by the vibratory members to merge.

10'. In an apparatus of the class described, the combination of a submersible vibratory element comprising a plurality of elongated vibratory members disposed for generally endwise advancement in a horizontal plane and at an angle to the path of travel of the vibratory element, transverse connecting means disposed above said members to which said vibratory members are rigidly secured, means connected to said transverse means for imparting high frequency vibrations to said vibratory element, and a vertically adjustable support for said vibratory element including an adjustable connection for said members thereto for efiecting vertical and transverse tilting adjustment of said vibratory members relative to the material being treated.

11. In an apparatus of the class described, the combination of a submersible vibratory element comprising a plurality of elongated vibratory members disposed for generally endwise advancement in a horizontal plane, transverse connecting means disposed above said members to which said vibratory members are rigidly secured, unitary means connected to said transverse means-for imparting high frequency vibrations to said vibratory element as a whole, and a vertically adjustable support for said vibratory element including an adjustable connection for said members thereto for effecting vertical and transverse tilting adjustment of said vibratory members relative to the material being treated.

12. In an apparatus of the class described, the combination with a screed, a submersible vibratory element mounted in front of said screed for vertical adjustment and comprising a, plurality of connected spaced elongated vibratory members disposed for generally endwise advancement in a horizontal plane and ar'ra'nged at an angle in the horizontal plane of travel of the vibratory element, vibratory means connected to said vibratory element for imparting high frequency vibrations to said vibratory element, a support for said vibratory element connected to the screed for advancement of the element therewith, and a tiltably adjustable connection for said vibratory element to said support for tilting said vibratory members vertically relative to their plane of advancement and relative to the shoe of the screed.

13. In an apparatus of theclass described, the combination with a screed, a submersible vibratory element mounted in front of said screed for vertical adjustment and comprising a plurality of connected spaced elongated vibratory members disposed for generally endwise advancement in a horizontal plane and arranged at an angle in the horizontal plane of travel of the vibratory element, and means for imparting high frequency vibrations to said vibratory element.

CORWILL JACKSON. 

